GitHub user jianqiao opened a pull request:
https://github.com/apache/incubator-quickstep/pull/246
Improve disjunctive predicate pushdown to optimize more scenarios
This PR improves the `PushDownLowCostDisjunctivePredicate` optimization to
consider more applicable scenarios -- precisely it will push down the partial
predicate when it has a low selectivity. This results in 4X speedup for TPC-H
Q19.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/incubator-quickstep improve-pushdown
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-quickstep/pull/246.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #246
----
commit ed72e2477033438e922195aa2632003ab037ab7b
Author: Jianqiao Zhu <jianq...@cs.wisc.edu>
Date: 2017-05-03T04:55:52Z
Improve disjunctive predicate pushdown to optimize more scenarios.
----
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
